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[Bug 1098635] Re: filter_scheduler should select from a pool of best hosts, not the single best host

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>
Date: Thu, 21 Feb 2013 09:01:12 -0000
Reply-to: Bug 1098635 <1098635@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Changed in: nova
       Status: Fix Committed => Fix Released

** Changed in: nova
    Milestone: None => grizzly-3

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https://bugs.launchpad.net/bugs/1098635

Title:
  filter_scheduler should select from a pool of best hosts, not the
  single best host

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  After executing the weighing functions, the filter_scheduler chooses
  the first host in the weighed_hosts list. However, it is very rarely
  the case in a large data center that a single host is "best". The code
  should randomly choose from a pool of n best hosts, where n is
  configurable.

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